UM1870 datasheet(13/58 Pages) STMICROELECTRONICS

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UM1870

Hardware description

2.2.1

Current measurements

To monitor power consumption of the entire BlueNRG-MS daughterboard, remove the

jumper from U2 and insert an ammeter between pins 1 and 2 of the connector. Since power

consumption of the BlueNRG-MS during most operation time is very low, an accurate

instrument in the range of few microamps may be required.

2.2.2

Hardware setup

Plug the BlueNRG-MS daughterboard into J4 and J5 connectors as in Figure 1.

Ensure the jumper configuration on the daughterboard is as in Figure 1

Connect the motherboard to the PC with an USB cable (through connector CN1).

Verify the PWR LED lights is on.

2.2.3

STM32L preprogrammed application

The STM32L on STEVAL-IDB005V1 motherboard is preprogrammed with the sensor demo

application when the kits components are assembled (refer to Section 5 for the application

description).

Table 2. Connections between BlueNRG-MS board and motherboard on left connector

J4 motherboard

J3 daughterboard

DB_PIN1

3V3

DB_PIN3

GND

DB_PIN2

GND

3V3

U2 pin 1

DB_SDN_RST

RST

3V3

U2 pin 1

Table 3. Connections between BlueNRG-MS board and motherboard on right

connector

J5 motherboard

J4 daughterboard

GND

DB_CSN

CSN

DB_IO3_IRQ

IRQ

DB_SCLK

CLK

DB_IO2

DB_SDI

MOSI

DB_IO1

DB_SDO

MISO

DB_IO0

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